<template>
  <el-upload
      class="avatar-uploader"
      action="http://localhost:8081/upload"
      :show-file-list="false"
      :on-success="handleAvatarSuccess"
      :before-upload="beforeAvatarUpload"
      :headers="headers"
  >
    <img v-if="imageUrl" :src="'../../public/img/'+imageUrl" class="avatar" />
    <el-icon v-else class="avatar-uploader-icon"><Plus /></el-icon>
  </el-upload>
</template>

<script lang="ts" setup>
import { ref ,defineEmits,defineProps,watch,computed} from 'vue'
import { ElMessage } from 'element-plus'
import { Plus } from '@element-plus/icons-vue'

import type { UploadProps } from 'element-plus'

const props = defineProps({
  message: String
});

watch(() => props.message, (newVal) => {
  imageUrl.value = newVal;  // 将接收到的 props 值赋给另一个变量
});

const headers = computed(()=>{
  const jwt=localStorage.getItem('token')
  return{
    authorization:jwt
  }
})

const imageUrl = ref('')


const emit = defineEmits(['childEvent']);

const emitEvent = (data) => {
  emit('childEvent', data);
};

const handleAvatarSuccess: UploadProps['onSuccess'] = (
    response
) => {
  console.log(response.data)
  imageUrl.value = response.data
  emitEvent(imageUrl.value)
}

const beforeAvatarUpload: UploadProps['beforeUpload'] = (rawFile) => {
  if (rawFile.type !== 'image/jpeg') {
    ElMessage.error('Avatar picture must be JPG format!')
    return false
  } else if (rawFile.size / 1024 / 1024 > 2) {
    ElMessage.error('Avatar picture size can not exceed 2MB!')
    return false
  }
  return true
}


</script>

<style scoped>
.avatar-uploader .avatar {
  width: 178px;
  height: 178px;
  display: block;
}
</style>

<style>
.avatar-uploader .el-upload {
  border: 1px dashed var(--el-border-color);
  border-radius: 6px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: var(--el-transition-duration-fast);
}

.avatar-uploader .el-upload:hover {
  border-color: var(--el-color-primary);
}

.el-icon.avatar-uploader-icon {
  font-size: 28px;
  color: #8c939d;
  width: 178px;
  height: 178px;
  text-align: center;
}
</style>
